I played a great game yesterday, The Stars are Right
Chthulu and cultists and astrology and a rubic cube of madness.
Also, I tried Cash and Guns the other day using regular playing cards, but with much simplified rules. It worked well.
I ignored pretty much everything, except 3 red bullets, 4 black duds, 3 wounds kills, survivors and non-cowards take "money", and a person can duck. No Band Bang Bang, no sharing (and math and fractions) over the spoils.